[ncl-talk] Ease grid map is misaligned

[Rick Brownrigg]

Hi,

What are the dimensions/units of your grid -- in particular, with the map
drawn by gsn_csm_contour, what is the Y axis?

Rick

On Wed, Jun 1, 2016 at 5:49 PM, Mary Haley <haley at ucar.edu> wrote:

> Hi Ipshita,
>
> This is indeed strange.
>
> As a quick test, can you try (for the gsn_csm_contour_map plot):
>
> res at gsnAddCyclic = False
>
> Also, are you getting any kind of error messages?
>
> You can also try using raster contours:
>
>   res at cnFillMode = "RasterFill"
>
> If you continue to have problems, we may need to take a look at your data,
> and in particular the lat/lon arrays on the file. It looks like you are
> doing everything correctly otherwise.
>
> --Mary
>
>
> On Wed, Jun 1, 2016 at 5:33 PM, Ipshita Majhi <ipmajhi at alaska.edu> wrote:
>
>> Dear NCL,
>>
>> I have been trying to plot this map correctly for a long time. I don't
>> know where I am going wrong. I will be grateful if you could guide me on
>> this. I am also attaching the pdf version of the map I am getting.
>>
>> Best Regards
>> Ipshita
>> ;***************************************************
>> ;*******************************************
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"
>> ;*******************************************
>>
>> ;============================================
>> ; set up parameters
>> ;============================================
>>
>> ;********************************************
>> ;This is reading in Snow water equivalent which goes from 0 to 250 mm
>> ; from 1982 to 2012
>> ;********************************************
>>
>> a=addfile("/Users/ipshita/Desktop/GlobsnowV2.0/version02/monthly_82_13.nc
>> ","r")
>>
>> swe=a->swe
>>
>> time=a->time
>> lat=a->lat
>> lon=a->lon
>>
>> swe_FillValue=-9.99e+08
>>
>> printVarSummary(swe)
>>
>> utc_date = cd_calendar(time, 0)
>> year=utc_date(:,0)
>> month=utc_date(:,1)
>>
>> ;********************************************
>>
>> ;*******************************************
>> ; Create plots
>> ;*******************************************
>>
>>     wks = gsn_open_wks("pdf","ease_map")
>>     gsn_define_colormap(wks,"amwg")             ; Change color map
>>
>>     res                     = True              ; Plot modes desired.
>>     res at gsnMaximize         = True              ; Maximize plot
>>
>> ;---This resource not needed in V6.1.0
>>     res at gsnSpreadColors     = True              ; use full range of
>> colormap
>>
>>     res at cnFillOn            = True              ; color plot desired
>>     res at cnLinesOn           = False             ; turn off contour lines
>>     res at pmLabelBarWidthF    = 0.9               ; make wider
>>     res at pmLabelBarHeightF   = 0.1               ; default is taller
>>     res at lbLabelFontHeightF  = .018              ; default is HUGE
>>
>>     res at cnLevelSelectionMode= "ExplicitLevels" ; set explicit contour
>> levels
>>     res at cnLevels            = (/0,1,5,10,25,100,200,300,400/)
>>
>> ;************************************************
>> ;No georeferencing: simple contour. Draws faster
>> ;************************************************
>>     res at tiMainString = "gsn_csm_contour"
>>     plot = gsn_csm_contour(wks,swe,res)    ; contour, no map
>>
>> ;*******************************************
>> ; georeferencing: plot on polar projection
>> ;*******************************************
>>                                              ; georeference
>>     swe at lat2d = a->lat
>>     swe at lon2d = a->lon
>>
>>     res at trGridType = "TriangularMesh"        ; allow missing coordinates
>>
>>     res at gsnPolar   = "NH"                          ; specify the
>> hemisphere
>>     res at mpMinLatF  = 35
>>     res at tiMainString = "gsn_csm_contour_map_polar"
>>
>>     plot = gsn_csm_contour_map_polar(wks,swe(0,:,:),res)
>>
>>
>> --
>> Ipshita Majhi
>> PhD Candidate
>> University of Alaska , Fairbanks
>> Atmospheric Science Department
>> (907)978-4220 ipmajhi at alaska.edu
>>
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>
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